/Engine/Plugins/Editor/ObjectMixer/ObjectMixer/Source/ObjectMixer/Public/ObjectFilter/ObjectMixerEditorObjectFilter.h
Specify a list of property names found in parent classes you want to show that aren't in the specified classes. Note that properties specified here do not override the properties specified inGetColumnsToExclude(), but do override the supported property tests so these will appear even if ShouldIncludeUnsupportedProperties returns false. For example, aULightComponentdisplays "LightColor" in the editor's details panel, butULightComponentitself doesn't have a property named "LightColor". Instead it's in its parent class,ULightComponentBase. In this scenario,ULightComponentis specified and PropertyInheritanceInclusionOptions is None, so "LightColor" won't appear by default. Specify "LightColor" in this function to ensure that "LightColor" will appear as a column as long as the property is accessible to one of the specified classes regardless of which parent class it comes from.
virtual [TSet](API\Runtime\Core\Containers\TSet)< [FName](API\Runtime\Core\UObject\FName) > GetForceAddedColumns() const